Journal Articles Physical Review Research Year : 2020

Statistical mechanics of kinks on a gliding screw dislocation

Max Boleininger
  • Function : Author
  • PersonId : 1085467
Martin Gallauer
  • Function : Author
  • PersonId : 1085468
Sergei L Dudarev
  • Function : Author
  • PersonId : 1085469
Daniel R Mason
  • Function : Author
  • PersonId : 1070662
Danny Perez
  • Function : Author
  • PersonId : 1085470

Abstract

The ability of a body-centered-cubic metal to deform plastically is limited by the thermally activated glide motion of screw dislocations, which are line defects with a mobility exhibiting complex dependence on temperature, stress, and dislocation segment length. We derive an analytical expression for the velocity of dislocation glide, based on a statistical mechanics argument, and identify an apparent phase transition marked by a crossover temperature above which the activation energy for glide effectively halves, changing from the formation energy of a double kink to that of a single kink. The analysis is in quantitative agreement with direct kinetic Monte Carlo simulations.
Fichier principal
Vignette du fichier
PhysRevResearch.2.043254.pdf (550) Télécharger le fichier
Origin Publisher files allowed on an open archive

Dates and versions

hal-03054069 , version 1 (11-12-2020)

Identifiers

Cite

Max Boleininger, Martin Gallauer, Sergei L Dudarev, T D Swinburne, Daniel R Mason, et al.. Statistical mechanics of kinks on a gliding screw dislocation. Physical Review Research, 2020, 2, ⟨10.1103/physrevresearch.2.043254⟩. ⟨hal-03054069⟩
45 View
66 Download

Altmetric

Share

More